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<H1>reverse_bidirectional_iterator&lt;BidirectionalIterator, T, Reference, Distance&gt;</H1>

<Table CellPadding=0 CellSpacing=0 width=100%>
<TR>
<TD Align=left><Img src = "iterators.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD>
<TD Align=right><Img src = "type.gif" Alt=""   WIDTH = "194"  HEIGHT = "39" ></TD>
</TR>
<TR>
<TD Align=left><Img src = "adaptors.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD>
<TD Align=right></TD>
</TR>
<TR>
<TD Align=left VAlign=top><b>Categories</b>: iterators, adaptors</TD>
<TD Align=right VAlign=top><b>Component type</b>: type</TD>
</TR>
</Table>

<h3>Description</h3>
<tt>Reverse_bidirectional_iterator</tt> is an iterator adaptor that enables 
backwards traversal of a range.  <tt>Operator++</tt> applied to an object of 
class <tt>reverse_bidirectional_iterator&lt;<A href="BidirectionalIterator.html">BidirectionalIterator</A>&gt;</tt> 
means the same thing as
<tt>operator--</tt> applied to an object of class <tt><A href="BidirectionalIterator.html">BidirectionalIterator</A></tt>.
There are two different reverse iterator adaptors: the class
<tt>reverse_bidirectional_iterator</tt>
has a template argument that is a <A href="BidirectionalIterator.html">Bidirectional Iterator</A>,
and the class <tt><A href="ReverseIterator.html">reverse_iterator</A></tt> has a template argument that is a
<A href="RandomAccessIterator.html">Random Access Iterator</A>. <A href="#1">[1]</A>
<h3>Example</h3>
<pre>
template &lt;class T&gt;
void forw(const <A href="List.html">list</A>&lt;T&gt;&amp; L)
{
   list&lt;T&gt;::iterator first = L.begin();
   list&lt;T&gt;::iterator last = L.end();
   while (first != last) 
      cout &lt;&lt; *first++ &lt;&lt; endl;
}      

template &lt;class T&gt;
void rev(const <A href="List.html">list</A>&lt;T&gt;&amp; L)
{
   typedef reverse_bidirectional_iterator&lt;list&lt;T&gt;::iterator,
                                          T,
                                          list&lt;T&gt;::reference_type,
                                          list&lt;T&gt;::difference_type&gt; 
           reverse_iterator; <A href="#2">[2]</A>
   reverse_iterator rfirst(L.end());
   reverse_iterator rlast(L.begin());

   while (rfirst != rlast) 
      cout &lt;&lt; *rfirst++ &lt;&lt; endl;
}      
</pre>
<P>
In the function <tt>forw</tt>, the elements are printed in the order
<tt>*first</tt>, <tt>*(first+1)</tt>, ..., <tt>*(last-1)</tt>.  In the function 
<tt>rev</tt>, they are printed in the order <tt>*(last - 1)</tt>, <tt>*(last-2)</tt>, ...,
<tt>*first</tt>. <A href="#3">[3]</A>
<h3>Definition</h3>
Defined in <A href="iterator.h">iterator.h</A>.
<h3>Template parameters</h3>
<Table border>
<TR>
<TH>
Parameter
</TH>
<TH>
Description
</TH>
<TH>
Default
</TH>
</TR>
<TR>
<TD VAlign=top>
<tt>BidirectionalIterator</tt>
</TD>
<TD VAlign=top>
The base iterator class.  Incrementing an object of class
   <tt>reverse_bidirectional_iterator&lt;BidirectionalIterator&gt;</tt> corresponds to decrementing 
   an object of class <tt>BidirectionalIterator</tt>.
</TD>
<TD VAlign=top>
&nbsp;
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>T</tt>
</TD>
<TD VAlign=top>
The reverse iterator's value type.  This should always be the same
   as the base iterator's value type.
</TD>
<TD VAlign=top>
&nbsp;
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>Reference</tt>
</TD>
<TD VAlign=top>
The reverse iterator's reference type.  This should always be the same
   as the base iterator's reference type.
</TD>
<TD VAlign=top>
<tt>T&amp;</tt>
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>Distance</tt>
</TD>
<TD VAlign=top>
The reverse iterator's distance type.  This should always be the
   same as the base iterator's distance type.
</TD>
<TD VAlign=top>
<tt>ptrdiff_t</tt>
</TD>
</tr>
</table>
<h3>Model of</h3>
<A href="BidirectionalIterator.html">Bidirectional Iterator</A>.
<h3>Type requirements</h3>
The base iterator type (that is, the template parameter <tt>BidirectionalIterator</tt>)
must be a <tt><A href="BidirectionalIterator.html">Bidirectional Iterator</A></tt>.  The <tt>reverse_bidirectional_iterator</tt>'s value type, 
reference type, and distance type (that is, the template parameters
<tt>T</tt>, <tt>Reference</tt>, and <tt>Distance</tt>, respectively) must be the same as the
base iterator's value type, reference type, and distance type.
<h3>Public base classes</h3>
None.
<h3>Members</h3>
<Table border>
<TR>
<TH>
Member
</TH>
<TH>
Where defined
</TH>
<TH>
Description
</TH>
</TR>
<TR>
<TD VAlign=top>
<tt>self</tt>
</TD>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator</tt>
</TD>
<TD VAlign=top>
See below
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator()</tt>
</TD>
<TD VAlign=top>
 <A href="trivial.html">Trivial Iterator</A>
</TD>
<TD VAlign=top>
The default constructor
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator(const reverse_bidirectional_iterator&amp; x)</tt>
</TD>
<TD VAlign=top>
 <A href="trivial.html">Trivial Iterator</A>
</TD>
<TD VAlign=top>
The copy constructor
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator&amp; operator=(const reverse_bidirectional_iterator&amp; x)</tt>
</TD>
<TD VAlign=top>
 <A href="trivial.html">Trivial Iterator</A>
</TD>
<TD VAlign=top>
The assignment operator
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator(BidirectionalIterator x)</tt>
</TD>
<TD VAlign=top>
<tt>reverse_bidirectional_iterator</tt>
</TD>
<TD VAlign=top>
See below.
</TD>
</TR>
<TR>
<TD VAlign=top>
<tt>BidirectionalIterator base()</tt>
</TD>
<TD VAlign=top>
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